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  • 1
    ISSN: 0749-503X
    Keywords: Yeast ; genome ; MCM2 ; MCM3 ; CDC46 ; KRE2 ; KTR1 ; MNT1 ; YUR1 ; DUR1,2 ; protein glycosylation ; lipase ; peroxisomal targeting signal ; DNA replication ; cdc21sp ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A 12 820 bp fragment from the right arm of chromosome II of Saccharomyces cerevisiae was sequenced and analysed. This fragment contains six non-overlapping long open reading frames (ORFs) designated from the centromere- to the telomere-proximal ends as: YBR1441, 1443, 1444, 1445, 1446 and 1448. YBR1441 encodes a polypeptide of 845 amino acids which shares a long consensus domain with products of S. cerevisiae MCM2, MCM3, CDC46 and Schizosaccharomyces pombe cdc21+ genes. These genes are involved in DNA replication. YBR1445 encodes a polypeptide of 404 amino acids which has strong similarity with the S. cerevisiae KRE2/MNT1, YUR1, KTR1 gene products. The KRE2/MNT1 protein is an α-1,2-mannosyltransferase. The product of YBR1444, which encodes a protein of 375 amino acids, presents a lipase signature sequence and a peroxisomal targeting signal. YBR1448, whose sequence extends further on the telomere-proximal end of the fragment, is identical to the 3′ end of the DUR1,2 gene encoding urea amidolyase. The two ORFs, YBR1443 and YBR1446, exhibit no significant similarity with any known gene.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0749-503X
    Keywords: Saccharomyces cerevisiae ; chromosome sequencing ; chromosome XV ; Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We have determined the nucleotide sequence of a fragment of chromosome XV of Saccharomyces cerevisiae cloned into cosmid pEOA048. The analysis of the 26 857 bp sequence reveals the presence of 19 open reading frames (ORFs), and of one RNA-coding gene (SNR17A). Six ORFs correspond to previously known genes (MKK1/SSP32, YGE1/GRPE/MGE1, KIN4/KIN31/KIN3, RPL37B, DFR1 and HES1, respectively), all others were discovered in this work.Only five of the new ORFs have significant homologs in public databases, the remaining eight correspond to orphans (two of them are questionable). O5248 is a probable folylpolyglutamate synthetase, having two structural homologs already sequenced in the yeast genome. O5273 shows homology with a yeast protein required for vanadate resistance. O5268 shows homology with putative oxidoreductases of different organisms. O5257 shows homology with the SAS2 protein and another hypothetical protein from yeast. The last one, O5245, shows homology with a putative protein of Caenorhabditis elegans of unknown function. The present sequence corresponds to coordinates 772 331 to 799 187 of the entire chromosome XV sequence which can be retrieved by anonymous ftp (ftp. mips. embnet. org).
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0749-503X
    Keywords: Cosmid library ; I-SceI fragmentation ; colinearity ; Life and Medical Sciences ; Genetics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A consortium of European laboratories has been organized to systematically sequence the genome of Saccharomyces cerevisiae. As part of the BIOTECH program aimed at sequencing chromosomes XI and II, we have constructed a total genomic library of yeast strain FY1679 (a direct S288C derivative) into cosmid vectors pWE15 and pOU61cos. Primary clones from four independent libraries totalling 190 genome equivalents have been stored at -80°C.A subset of 1939 independent clones (six genome equivalents) was hybridized using purified chromosomes XI and X as probes. A total of 147 chromosome XI-specific cosmid clones was used to construct the physical map of that chromosome. Mapping methods included a combination of classical bottom-up strategies (fingerprinting, hybridizations) and a novel top-down strategy using I-SceI chromosome fragmentation. The 147 cosmid clones form a unique contig covering the entire chromosome XI (666 kb) with the sole exceptions of the (C1-3A)n repeats of the telomeres. Colinearity of cosmid inserts with yeast DNA was directly verified. A complete EcoRI map of chromosome XI was deduced from partial overlaps of cosmids and used for the sequencing program. Comparison of this map with the genetic map shows unexpected divergences that have been solved by subsequent genetic analysis, yet underline the necessity of independent physical mapping in genome projects.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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